RU2587522C2 - Method of inspecting state geodetic network stations and apparatus therefor - Google Patents

Method of inspecting state geodetic network stations and apparatus therefor Download PDF

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Publication number
RU2587522C2
RU2587522C2 RU2014143917/28A RU2014143917A RU2587522C2 RU 2587522 C2 RU2587522 C2 RU 2587522C2 RU 2014143917/28 A RU2014143917/28 A RU 2014143917/28A RU 2014143917 A RU2014143917 A RU 2014143917A RU 2587522 C2 RU2587522 C2 RU 2587522C2
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Russia
Prior art keywords
ghs
location
sgn
image
images
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RU2014143917/28A
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Russian (ru)
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RU2014143917A (en
Inventor
Владимир Леонидович Кашин
Валентин Витальевич Лебедев
Леонард Иосифович Яблонский
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Федеральное государственное бюджетное учреждение науки "Научный геоинформационный центр Российской академии наук"
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Priority to RU2014143917/28A priority Critical patent/RU2587522C2/en
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Abstract

FIELD: physics.
SUBSTANCE: method of inspecting state geodetic network (SGN) stations includes, for each of said stations, collecting information materials on the SGN station and on typical external features thereof, determining the location of the SGN station, identification thereof, recording images of the area of location of the SGN station and documentation of the SGN station inspection results. The invention uses Earth remote probing (ERP) materials on the previous stage of inspecting the SGN station, collection of archive ERP materials on said area, displaying an archive image of the area of the location of the SGN station and an up-to-date image of the area of the location of the SGN station. The method includes association of the images, comparing images of corresponding ERP areas, identifying retained and lost elements of the SGN station, such as features characterising an external mark, the centre and external design of the station, and storing the SGN station inspection results. An apparatus for carrying out the method of inspecting SGN stations comprises a computer, a computer control unit, a communication link between the control unit and the computer, a display, a communication link between the computer and the display, an image holder for storing archive photographic images of the area, an application glass, an illuminator, a digital camera with a view finder, a tripod, a digital camera control module and a communication link between the digital camera and the computer.
EFFECT: faster operation and quality of the process of comparing fragments of archive analogue images with digital images displayed on a display screen.
7 cl, 1 dwg

Description

The invention relates to the field of geodesy and photogrammetry. The invention can be used in the design, creation and restoration of geodetic networks. Geodetic networks are the basic basis for solving fundamental and applied problems of geodetic support and mapping of territories, land cadastre and geodynamic research.

The requirements for geodetic networks are regulated by state legislation, according to which the points of the State geodetic network are subject to periodic inspection [Basic Provisions on the State Geodetic Network of the Russian Federation (GKINP (GNTA) -01-006-03), M., 2003].

Technical regulations, documents, scientific literature and patents describe in detail field ground methods for examining points using geodetic instruments [US 7225548, 05.06.2007. US 6202535 B1. 2005/0005463 A1, 2005/0188555 A1, RU 116224, 10/14/2011. RU 1827136 A3, 03/10/1996. RU 2123165 C1, 10.12.1998. RU 2155323 C1, 08.27.2000. RU 2274876 C1, 04.20.2006. RU 2242019 C2, 12/10/2004. 2381447 C1, 10/01/2008. “Temporary instructions for the examination and restoration of points and signs of the state geodetic and leveling networks of the USSR. RIO VTS, 1970 ”].

Field work requires significant financial costs for expeditionary, travel and transportation support.

In this regard, when creating geodetic and topographic documents and updating them, preference is given to cameral methods of performing work using photogrammetric methods and instruments.

However, the known methods for examining GHS points do not solve the problem of reducing the volume of field work.

The essence of the proposed technical solutions is that in order to solve this problem, in addition to the well-known production operations, to collect information materials about the location of the GHS point and its characteristic external features, determine the location of the GHS point, identify it as a GHS point, fix the image of the location area GGS point by means of remote sensing of the Earth (RS), documenting the results of the survey introduced new operations consisting in the use of information onnyh materials RSD to the era preceding the survey GGS points.

For this purpose, archival materials of remote sensing data are selected for the location area of the GHS point, the archive image of the location area of the GHS point and the modern image of the location area of the GHS point immediately obtained before the examination of the GHS point are visualized, images are linked, images from the corresponding areas of remote sensing are compared. By means of such a comparison, the preserved and lost elements of the GHS item are identified, such as the outer sign, center and exterior design of the item. After these operations, the results of the examination of the GHS point are stored on physical information carriers, mainly electronic.

In addition, after visualizing the archived image of the location area of the GHS site and the modern image of the location area of the GHS point, they perform mutual orientation and scaling of these images. If necessary, the images are interconnected to each other according to the displays in the remote sensing materials of the preserved terrain objects, identification marks, GHS points, but using photogrammetric methods for performing spatial notches in determining the location of topographic objects. To facilitate the implementation of the method, the mutual binding of images to each other is carried out using archival materials of ground-based geodetic surveys of the terrain.

The advantage of the proposed method, in comparison with the well-known technical solutions, is the exclusion of field geodetic work when examining the GHS points, providing for the financially intensive costs of expeditionary, travel and transportation support.

With archived photographs, the device according to the patent RU 2226262 C2, 05.23.2001 allows you to work. The disadvantage of this device is that small-scale photographs can only be observed on a 1: 1 scale, and special difficulties arise when working with negatives of photographs.

The claimed method of examining the GHS points best allows you to implement a device containing at least one electronic computing tool with a display, a picture holder and a control unit of the electronic computing tool.

New in the proposed device is the presence of a digital camera with a device for mounting it, moreover, a picture holder is placed in the subject plane of the digital camera, and the digital camera has a communication channel with electronic computing means and is equipped with a control module.

Illumination of the object plane of a digital camera is carried out either by the first illuminator when working with opaque originals of archived photographs of the area or the second illuminator used when working with transparent originals.

The image captured by the camera is transmitted through a communication channel to an electronic computing facility with a first and second display.

On one display, a modern image of the location area of the GHS point is projected, and on the second display, the image of the location area of the GHS point or additional text and graphic information about the characteristics of the GHS point are displayed.

This display can be connected to an independent electronic computing facility having a communication channel with a digital camera.

The advantage of the proposed device, compared with the known one, is that it is possible to orient digital images, rather than analog terrain photographs made on plastic or paper, without their preliminary scanning.

Devices for performing scanning of photographs of the area are less productive than devices for simultaneous image acquisition. Often a scan of a terrain photograph takes several minutes, and the simultaneous receipt of a digital copy of a terrain photograph does not exceed several seconds.

A device for implementing the method of examining GHS points contains a computer 1, a computer control unit 1, a communication channel 3 of a control unit 2 with a computer 1, equipped with a communication channel 4 with a digital base 5 for storing data of an electronic data storage device of the GHS inspection period, display 6, a communication channel 7 of a computer 1 with a display 6, a photo holder 8 for placing an archived photograph of a locality 9, an applied glass 10 of a photo holder 8 for aligning photographs, a backlight illuminator 11 in transmitted light of a photograph 9 on a transparent basis, a backlight illuminator 12 of a photograph 9 made on an opaque basis, a digital camera 13 with a viewfinder 14, a tripod 15 with a height-adjustable mounting seat for a digital camera 13, a digital camera 13 control module 16, a digital camera 13 communication channel 17 with a module 16, a computer digital camera 13 communication channel 18, a display 19 and the communication channel 20 of the computer with the display 17.

Communication channels (items 4, 7, 17 18 and 19) in FIG. 1 are shown by dashed lines, since they can be made both in cable version and in wireless version.

It is optimal to use the viewfinder of a digital camera in screen design, in addition, the illuminator can be made on the basis of an electroluminescent film of cold glow.

The desk-based method for examining a point of a state geodetic network is implemented in the following sequence.

From catalogs and lists of data on the location of the GHS point, its coordinates are selected. These coordinates are entered into the computer 1 from the control unit 2 of its operation using the communication channel 3. Using the computer 1 through the communication channel 4 from a local or remote database 5 for storing remote sensing data of the survey period of the GHS, a digital image of the area with the known coordinates of the GHS is obtained. This image is transmitted to the display 6 through the communication channel 7 of this display with the computer 1. Next on the image holder 8 is placed an archive photograph 9 of the area with an uniquely identified image of the GHS point. The photograph 9 is pressed by the applied glass 10 to the subject plane of the image holder 8. If the photograph 9 is made on a transparent basis, then the illuminator 11 is illuminated in transmitted light. The illuminator 12 is used for the upper reflective illumination of a photograph 9 made on an opaque basis. The digital camera 13 projects a portion of a photograph 9 or an entire photograph onto the viewfinder 14 of this digital camera.

The relative displacement of the digital camera 13, mounted on a tripod 15, and the photograph 9 placed on the image holder 8, select the optimal size and scale of the observed fragment of the archive photograph 9 displayed on the screen of the viewfinder 14. This is achieved by using the mechanisms of the image holder 8, providing longitudinal and lateral displacement photograph 9 relative to the digital camera 13 and the mechanism for adjusting the height of the mounting location of the digital camera 13 tripod 15.

The process of digitally copying the image of the selected fragment of the photograph 9 in the memory of the digital camera 13 via the digital camera 13 control module 16 and the communication channel 17 between them is activated. Next, the obtained digital image of a fragment of the archived photograph of the area via the communication channel 18 of the digital camera 13 with a computer is transmitted to the display 19 through the communication channel 20 of the computer with the display 19.

Under the control of a computer operator, the software performs scaling and orientation of images obtained for the era of the previous survey of the GTS site and for the era of the current survey of the GHS point.

The terrain images visualized on the screens of displays 7 and 8 are compared and conclusions are made about the presence or absence of the GHS point on the terrain and its safety. Signs characterizing the absence of the GHS point and its safety on the ground are traces of human activities at the location of the GHS point and the influence of erosive, weather and climatic environmental factors on the external elements of the GHS point.

Using the method of inspection of points of the state geodetic network and the device for its implementation will significantly reduce labor costs and increase the economic efficiency of the inspection of points of the state geodetic network. The application of the method and device will provide a solution to the problem of extraterritorial inspection of points of the geodetic network in areas of inaccessible, uninhabited areas. The method can also be used to determine the location of geodetic networks in a foreign territory.

Claims (7)

1. A method for examining points of the state geodetic network (GHS), including for each of the points collecting information materials on the location of the GHS and its characteristic external signs, determining the location of the GHS, identifying it as a GHS, capturing images of the location of the GHS Earth remote sensing (DZD), documenting the results of the survey of the GHS point, characterized in that they use the data of the DZD for the era of the previous survey of the point GHS, select archived data for the remote sensing data for this area, visualize the archived image of the location area of the GHS point and the modern image of the location area of the GHS point, immediately obtained before examining it, carry out the interlinking of the images, compare the images of the corresponding areas of the remote sensing data, identify preserved and lost elements by this comparison GHS paragraph, such as signs characterizing the outer sign, center and external design of the paragraph, save the results of the examination of the paragraph GGS and by documenting on physical media.
2. The method according to p. 1, characterized in that after the visualization of the archive image of the location area of the location of the GHS and the modern image of the location of the location of the GHS perform mutual orientation and scaling of these images.
3. The method according to p. 1, characterized in that the mutual reference of the images to each other is carried out according to the displays in the remote sensing materials of the preserved terrain objects, identification marks, GGS points using photogrammetric methods for performing spatial serifs when determining the location of topographic objects.
4. The method according to p. 1, characterized in that the mutual reference of images to each other is carried out using archival materials of ground-based geodetic surveys of the terrain.
5. A device for implementing a method for examining a point of a state geodetic network (GHS), comprising at least one electronic computing means with a display, an electronic computing means control unit, characterized in that it includes a device for attaching a digital camera, a digital camera in the subject plane in which the image holder is located, the digital camera control module, the digital camera having a communication channel with electronic computing means.
6. The device according to p. 5, characterized in that it contains a display for visualizing a digital image of an archive image of the area of the location of the GHS point, and the display has a communication channel with electronic computing means that implements the ability to digitally archive the image of the area of the location of the GHS point.
7. The device according to claim 5, characterized in that it contains a spotlight illuminator on an opaque substrate mounted on the side of the digital camera, and a spotlight illuminator on a transparent substrate mounted on the back of the locality image.
RU2014143917/28A 2014-10-31 2014-10-31 Method of inspecting state geodetic network stations and apparatus therefor RU2587522C2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2700739C1 (en) * 2018-11-01 2019-09-19 Владимир Леонидович Кашин Method of survey of points of state geodetic network and device for its implementation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2226262C2 (en) * 2001-05-23 2004-03-27 29 Нии Мо Рф Method of renewal of digital map of terrain and device to implement it
US6757445B1 (en) * 2000-10-04 2004-06-29 Pixxures, Inc. Method and apparatus for producing digital orthophotos using sparse stereo configurations and external models
RU2246695C2 (en) * 2002-12-20 2005-02-20 29 Нии Мо Рф Method for actualization of digital area map and device for realization of said method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6757445B1 (en) * 2000-10-04 2004-06-29 Pixxures, Inc. Method and apparatus for producing digital orthophotos using sparse stereo configurations and external models
RU2226262C2 (en) * 2001-05-23 2004-03-27 29 Нии Мо Рф Method of renewal of digital map of terrain and device to implement it
RU2246695C2 (en) * 2002-12-20 2005-02-20 29 Нии Мо Рф Method for actualization of digital area map and device for realization of said method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2700739C1 (en) * 2018-11-01 2019-09-19 Владимир Леонидович Кашин Method of survey of points of state geodetic network and device for its implementation

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Effective date: 20161101

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Effective date: 20191108